The main UN agency supporting Palestinian refugees needs $150m in donations in order to keep operating until the end of the year, the head of the agency said at a news conference in Gaza City.

Part of the budgetary shortfalls are due to several key donors withholding funding over misconduct accusations within the agency being investigated by the UN, Pierre Krahenbuhl, Commissioner General of the United Nations Relief and Works Agency (UNRWA), said on Tuesday.

Krahenbuhl said Switzerland, the Netherlands and Belgium had suspended their contributions to the organisation while a UN inquiry into the charges was under way, Reuters news agency reported.

"Our (2019) budget for all UNRWA operations in Gaza, the West Bank, East Jerusalem, Syria, Jordan, Lebanon is $1.2bn. At this moment we have a remaining shortfall of $150m," Krahenbuhl said, according to Reuters.

An UNRWA spokeswoman said on Tuesday that Krahenbuhl was notified in March that an investigation was underway by the UN Secretariat in New York "based on allegations received against UNRWA personnel relating to unsatisfactory conduct", Reuters reported.

At the news conference, Krahenbuhl urged all parties to await official findings, pledging: "We will not only act on them, we will abide by them."

UNRWA was established to aid some 700,000 Palestinians who fled or were forced from their homes by Jewish paramilitaries before and during Israel's creation in 1948.

Today, the agency serves about five million Palestinians in Gaza and the West Bank, as well as Lebanon, Jordan and Syria, which view it as a vital safety net, providing services that host governments do not.

US cuts to UNRWA

"The vast majority of countries today are very clear about their support to UNRWA's mandate and their recognition that Palestinian refugees need to continue to be assisted, respected, and see their rights defended," Krahenbuhl said on Tuesday.

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